using Microsoft.EntityFrameworkCore;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace MoneyMap.Models;

public enum ReceiptParseStatus
{
    NotRequested = 0,
    Queued = 1,
    Parsing = 2,
    Completed = 3,
    Failed = 4
}

[Index(nameof(TransactionId), nameof(FileHashSha256), IsUnique = true)]
public class Receipt
{
    [Key]
    public long Id { get; set; }

    // Link to transaction (nullable to support unmapped receipts)
    public long? TransactionId { get; set; }
    public Transaction? Transaction { get; set; }

    // File metadata
    [MaxLength(260)]
    public string FileName { get; set; } = string.Empty;

    [MaxLength(100)]
    public string ContentType { get; set; } = "application/octet-stream";

    [MaxLength(1024)]
    public string StoragePath { get; set; } = string.Empty; // \\barge.lan\receipts\...\ or blob key

    public long FileSizeBytes { get; set; }

    [MaxLength(64)]
    public string FileHashSha256 { get; set; } = string.Empty; // for dedupe

    public DateTime UploadedAtUtc { get; set; } = DateTime.UtcNow;

    // Parsed header fields (optional, set by parser job)
    [MaxLength(200)]
    public string? Merchant { get; set; }

    public DateTime? ReceiptDate { get; set; }

    public DateTime? DueDate { get; set; } // For bills - payment due date

    [Column(TypeName = "decimal(18,2)")]
    public decimal? Subtotal { get; set; }

    [Column(TypeName = "decimal(18,2)")]
    public decimal? Tax { get; set; }

    [Column(TypeName = "decimal(18,2)")]
    public decimal? Total { get; set; }

    [MaxLength(8)]
    public string? Currency { get; set; }

    // User notes provided to AI parser
    [MaxLength(2000)]
    public string? ParsingNotes { get; set; }

    // Parse queue status
    public ReceiptParseStatus ParseStatus { get; set; } = ReceiptParseStatus.NotRequested;

    // One receipt -> many parse attempts + many line items
    public ICollection<ReceiptParseLog> ParseLogs { get; set; } = new List<ReceiptParseLog>();
    public ICollection<ReceiptLineItem> LineItems { get; set; } = new List<ReceiptLineItem>();
}